Bulletin - United States National Museum - Smithsonian Institution

184 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
Genus HOCHSTETTERIA Velain.
HOCHSTETTERIA LIMOIDES Smith.
There are three lots of this species in the collection of the United
States National Museum, all from Port Alfred, as follows: Cat. No.
186925, contains three valves of this species (Coll. No. 295); Cat. No.
186930, one valve (Coll. No. 300); Cat. No. 251067, one specimen
(Coll. No. 1584).
HOCHSTETTERIA VELAINI Smith.
Cat. No. 186926, U.S.N.M., two specimens from Port Alfred (Coll.
No. 296).
HOCHSTETTERIA ALFREDENSIS, new species.
Plate 39, figs. 6, 7.
Shell white, variously mottled with brown. Prodissoconch form-
ing a conspicuous shield winch is separated from the rest of the shell
by a strongly raised cord. The anterior and posterior lateral portion
of the succeeding part forms almost an isosceles triangle, the basal,
portion of which is well rounded. The valves are marked by fifteen
moderately strong, very regular radiating threads, and very regularly
spaced, equally strong, concentric threads, which form squarish pits
on the early portion of the shell and elongate pits near the base.
The junction of the radiate and concentric threads forms feeble,
rounded nodules. The hinge is shown 'in our figure.
Cat. No. 182925a, U.S.N.M., contains the type and two additional
specimens from Port Alfred (Coll. No. 295a). The type measures:
Altitude, 3.6 mm.; length, 3.3 mm. Cat. No. 249855, U.S.N.M., con-
tains another specimen from the same place (Coll. No. 1127).
HOCHSTETTERIA PARAMOEA, new species.
Plate 39, fig. 4.
Shell semitranslucent, white. Prodissoconch forming a conspicu-
ous shield which is separated from the rest of the shell by a strongly
raised cord. The shield itself is marked by very fine, closely spaced,
radiating threads. The anterior lateral margin of the succeeding
part slightly concave; posterior slightly convex; basal margin strongly
rounded. Outer surface marked by nine equal, and equally spaced,
regular, slender, radiating threads, and equally strong, very regularly
spaced, concentric threads, the junction of the two forming feeble
nodules.
Cat. No. 249854, U.S.N.M., contains the type and another specimen
from Port Alfred (Coll. No. 1126). The type measures : Altitude,
2.2 mm.; length, 2.1 mm.